Electric immersion heater



June 9, 1925/.

`J.N.TRAHAN ELECTRIC IMMERSION HEATER 1.Fj1ed May 1e, 1924 Patented .June 9, 1925.

UNITED STATES y JOSEPH NuoLEoN TRAHAN, or QUEBEC, armeno, CANADA.

ELECTRIC IMMER-SION HEATER.

Application led Hay 16,

To all wlwm it may concern.'

Be it known that I, JOSEPH- NAPOLEON TRAHAN, subject of the King of Great Britain, residing at Quebec, in the Province ofj Quebec, Canada, have invented certain new and useful Improvements in Electric Immersion Heaters; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as Awill enable others skilled in the art to which it appertains to make and use the same.

The present. invention pertains to an automatic heater of the immersion type, adapted to be immersed in a body of liquid for heatlf ing the same. s

The principal object lof the invention is the provision of a device of this character of simple construction and eHicient in operation.- T/he device comprises abox like casing, the wallsof which are slotted for thc entrance of water therein. AWithin the casing 'is disposed; a pair of spaced plates around which is wound a resistance wire. These plates are perforated so that the water4 within the casing may sur-round the resistance wire and thus become heated.

The plates are held spaced apart by means of a number of bolts passed therethrough. Simplicity of construction is attained by connecting the ends of the' wire to two of these bolts and then joining the ends of the current supplying conductors to the same The cover of the casing is preferably hinged in order that access to the interior ma be obtained. On the top of the cover is ormed a tube for enclosing the conductors and protecting them from the liquid in which the device is laced when in use.

The invention is ully disclosed in the following description and in the accompanying drawings in which: Figure 1 is a' perspective view of thc dcv1ce; l v

Figure 2 is a longitudinal vertical section thereof; .Y l

Figure 3 is a section on the line 3-3 of. Fi re 2; and, l f

igurel 4 is a section on the line 4-4 of Figure 2.

The .device com rises a. box like housing l formed of any sultable material, preferably metal. The lateral walls or sides are-slotted vertically as at 2. The bottom 3 is. also formed with `a longitudinal slot 4, as shown 1924. SerialNo. 713,805.

casing are-placed a pair of mica plates 10 and 11 spaced from the. lining 9 and also from each other. Those lates are held apart by means of a single lt 12 near the vlower edges thereof, an insulating sleeve 13 surrounding this bolt in the space'betweenV the plates. A pair of similar bolts 14 and 15 f are passed through the lates 10 and 11 near the upper edges thereo ,these members being surrounded by insulating sleeves 16 and 17 in the space between the plates.

The plates are :formed each with a lurality of perforations 18. A pair of con uctors 19 and 20 are aed through the tube 8, these members ing secured to the spacing bolts 14 and 15 respectively, as shownin Figure 2. From the bolt 14,-a coil of resistance wire 21 is wound around the plates 11` to the lower edge thereof." It is then extendedacross the space between the plates 10 and 11 as shown by the numeral 22, and is wound upwardlyas at 23 upon the late 10. The end thereof is joined to thev whereb a series circuit is com leted between t e conductors 19 and 20. Bbviously, current is supplied to these conductors and consequently to the coil from any suitable source. v

In use, the device is lowered into the kliquid to be heated, asillustrated in Figure 4. The liquid is free to flow throughout the device by way of the slot-s 2 and 4 and' perforations 2` and 18. In this manner, the v 'p conducting wire 21,22 and 23 is entirely surrounded by water, and the latter becomes heated due to the heat of'resistance devel without de arting from the spirit of the invention as indicated by the appended claims.

Having thus fully described the invention,

Jthe details of 'construction may be made f thereof, said plates being ada ted for the passage of Water therethroug resistance,

wire wound around said plates, and means for supplying current to said wire.

2. An immersion heater comprising a casing having slotted walls, a pair of insulation plates disposed in spaced relation within said casing and spaced from the walls thereof, said plates being adapted for the passage of water therethrough, resistance wire Wound around said plates, a tube formed on the top of said casing, and conductors spaced through said tube and connected to said resistance wire.

3. An immersion heater comprising a casinghaving slotted walls,a pair of insulation plates supported therein 1n spaced relation `from the walls of the casing, said plates being adapted for the passage of Water there.- through, bolts passed through said plates for holding them in spaced relation, a resistance wire wound around said plates and having its ends connected to two of said bolts, a tube formed on the top of said casing,and a pair of conductors passed through said tube and having their ends connected to said two bolts, the side walls of the easing being provided with an insulating lining perforated in registration with the slots ot' said walls. l' In witness whereof I have hereunto set my land. 1

JOSEPH NAPOLEON TRAHAN. 

